1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20 package org.apache.myfaces.orchestra.viewController; 21 22 /** 23 * Invokes ViewController events using the {@link ViewController} interface. 24 * <p> 25 * This requires that beans implement the ViewController interface in order 26 * to receive view lifecycle events. 27 * <p> 28 * Other implementations are possible that do not require a bean to implement a 29 * specific interface; see ReflectiveViewControllerExecutor for one example. 30 * <p> 31 * Note that each method here returns false if the target bean does not 32 * implement the ViewController interface; this allows this executor to 33 * be "chained" with others. 34 */ 35 public class InterfaceViewControllerExecutor extends AbstractViewControllerExecutor 36 { 37 public boolean invokeInitView(String beanName, Object bean) 38 { 39 if (bean instanceof ViewController) 40 { 41 ((ViewController) bean).initView(); 42 return true; 43 } 44 return false; 45 } 46 47 public boolean invokePreRenderView(String beanName, Object bean) 48 { 49 if (bean instanceof ViewController) 50 { 51 ((ViewController) bean).preRenderView(); 52 return true; 53 } 54 return false; 55 } 56 57 public boolean invokePreProcess(String beanName, Object bean) 58 { 59 if (bean instanceof ViewController) 60 { 61 ((ViewController) bean).preProcess(); 62 return true; 63 } 64 return false; 65 } 66 }